Cinema or analogous projecting apparatus



April 29, 1930. F. SEUFERT CINEMA OR ANALOGOUS PROJECTING APPARATUS Filed Feb. 1'7, 1928 3 Sheets-Sheet l WWW 3 Sheets-Sheet 2 F. SEUFERT CINEMA OR ANALOGOUS PROJECTING APPARATUS Filed Feb. 17, 1928 Apr-i129, 1930.

April 29, 1930. F. SEUFERT 9 5 9 CINEMA OR ANALOG'OUS PROJECTING APPARATUS Filed Feb. 17, 1928 3 Sheets-Sheet 3 I which by a spring 13 is formed with aworm 15' Patented Apr. 29, 1930 I I UNITED ISTATESTPATENT orrlcr.

rnmmucn snurnnr. or memos; GERMANY, ASSIGNOR or ONE-HALF 'ro HERMANN SEUFERQ or nnooxnnr, NEW rem:

01mm on nrnoeousjrnomc'rme Arrhenius.

Application fled February 17, 1928, Serial :No. 255,146, and in Germany October 22, 1927.

This invention relates to cinema or like projecting apparatus and articularly to the fire protective shutter of t e gate.

One'object of this inventlon 1s to provide hydraulic means insuring the prompt operation of the shutter. 4

Another object is to combine with said bydraulic means the pump for lubricating the diiferent spindles of the apparatus.

With these and other objects in View my invention consists substantially in the novel construction, combination and arrangement of parts as will be hereinafter more fully described and defined in the appended claims.

In the accompanying drawing which constitutes part of this s ecification and in which similar reference c aracters denote corresponding parts, Fig. 1 is a diagrammatic vertical section of a part of the apparatus showing the novel shutter operating means; Fig. 2 is a similar section at a right angle to that of Fig. 1 and Fig, 3 is a sectional top plan view thereof.

Referring to the 10 denotes the frame and 11 the casing containing the gears for the operation of the sprocket drums 12 of which only one is shown in this drawing and overwhich the film is fed. 13 denotes the driving shaft which may be driven from a motor (not shown) and which carries the fly wheel 14. This shaft which meshes with a worm gear 16 fixed on the spindle 17 of the lower sprocket drum 12. 18 denotes the conventional pump used forthe distribu tion of a lubricant to the difierent operating spindles of the apparatus and which is operated from the spindle 17 in well known manner. 19 denotes a tube through which the lubricant is passed from the pump 18 to branch tubes 20 leading to the different operating spindles of the apparatus and of which only one is shown in the drawings. Com

nected to the tube 19 is also a pressure cylln- I der 21 in which works a piston or plunger 22 23 acting thereon is normally held. retracted and in its initial position tends to move the shutter 24 into closing position. To this end the shutter 24 is hinged or pivoted at 2 to the frame 10 behind. the

drawings more in detail.

, without departin gate .25 and provided-with a crank arm 26.

The latter is connected by a link 27 to one 1 arm of a bell crank lever 28 fulcrumed to the frame as at 28' and the other arm of which is, connected b a link 29 to the piston rod 22 The lubricant passing through tube 19 into the pressure chamber 21 is adapted to normally counteract the pressure .of the sprlng 23 so as to move the piston forwardly and through the medium of the links 29, bell crank 28 and link 27 swing the shutter 24 of the through amount of oil or other lubricant enteringthe pressure chamber 21 to pass into the tubes 20.

It will be clear that if the pump 18 for some reason fails to operate or its operation is interrupted the spring 23 moves the piston 22 into its initial position as a result of which the shutter 24 will close thegate 25.

It is understood that various changes may be made in the construction of my apparatus vention. I, there ore, do not wish to restrict myself to the details shown and described.

WhatI claim is:

1. In a cinema or like projecting apparatus, the combination with the driving means and the shutter for the gate, of automatically controlled means for operating said shutter, said means including an element tending to close said shutter, a hydraulic pump operated from said driving means and ada ted to normally counteract said element to old said shutter open but on being interrupted in its operation, to release said element permitting it to efiect the closure of said shutter, and pressure controllilr'ilg means in said pump.

1 2. Ina cinema or e projecting apparatus,- the combination of the means, a laiw sa P p ri ro Sui mm a from the spirit of my infire protecting shutter for the gate, a ressure cylinder communicating with and a apted to receive the lubricant, a piston therein operatively connected to said shutter, a spring tending to retract said piston to close said shutter and adapted to be normally counteracted by the ressure of the lubricant pressing against sai piston but on interruption of the operation of said pump to be released and permitted to efi'ect the closure of said shutter and a controllable valve permitting the excess lubricant'to pass from said cyllnder t0 the parts to be lubricated.

3. In a cinema or the like projecting apparatus, the combination with driving means for said apparatus, of lubricating means driven by said first named means, a fire preventing shutter for the gate, means actuated by said lubricating means for opening said shutter when the former is being driven and automatic means for closing said shutter when said lubricating means is stopped.

In testimony whereof I aflix my signature.

FRIEDRICH SEUFERT. 

